What Is a Raster Image?

Think of a raster image like a mosaic. The image is stored as a fixed grid—e.g., 512×512 pixels—where each pixel has color information. Because it’s a fixed grid, a raster image has a “native” size. If you display it larger than intended, the browser or design tool must invent new pixels (interpolation), which reduces sharpness.

This is the key difference from vector images (like SVG), which store shapes as mathematical paths. Vectors can scale to any size without losing crisp edges, while raster images are resolution-dependent.

In automotive branding, raster images are common because they’re easy to preview, share, and use in most tools. For example, a website might load a compact badge icon as a raster file for speed and predictable rendering, especially when you control the size.

Here are a few car-logo examples as raster WebP from the Motomarks CDN (these default to WebP, medium size):

If you shrink these down, they stay clean. If you enlarge them far beyond their original pixel dimensions, you’ll start to see softness compared to an SVG.

Raster graphics became dominant early because they match how cameras and screens work. Cameras capture light into pixels, and displays render pixels. That made raster the natural format for photos—vehicle listings, showroom photography, and marketing imagery.

On the web, JPEG (JPG) became the go-to for photos thanks to strong compression, while PNG became common for interface graphics and logos because it supports transparency. More recently, WebP (and AVIF) emerged to reduce file sizes while preserving quality, improving page speed for image-heavy automotive sites.

For logos specifically, the industry historically bounced between raster and vector depending on tooling and distribution. Brand guidelines often include vector masters, but teams frequently end up using raster exports (PNG/WebP) in UI components, social templates, and email signatures.

A raster image has two core “size” concepts:

• Pixel dimensions (e.g., 256×256): how many pixels are stored.
• Display/print density (PPI/DPI): how tightly those pixels are packed when shown or printed.

Scaling and interpolation

When you scale a raster image up, software estimates new pixel colors using interpolation methods (nearest-neighbor, bilinear, bicubic, Lanczos). This is why text and sharp logo edges can look soft or jagged. Badges with thin strokes and tight geometry (like three-point stars or ring outlines) reveal scaling artifacts quickly.

Transparency and alpha edges

Logos often need transparent backgrounds. PNG and WebP can store an alpha channel. But transparency introduces a common issue: haloing around edges when a logo was exported against a different background color. A clean export preserves crisp alpha edges so the badge looks correct on light and dark UI.

Compression: lossy vs lossless

• JPG is lossy: it throws away detail to reduce file size. Great for photos, risky for logos (you’ll see ringing artifacts around edges).
• PNG is typically lossless: preserves sharp edges well, larger file sizes than JPG for photos.
• WebP supports both lossy and lossless, often giving smaller files than PNG while keeping logo edges clean.

For automotive logos and UI icons, you generally want lossless PNG/WebP or SVG (vector) when possible. If you must use raster, ensure your dimensions cover your largest intended display size (or provide multiple sizes via responsive images).

Logos are a special case because they’re mostly flat colors, sharp curves, and precise geometry.

• Use SVG (vector) when you need perfect scaling (responsive headers, retina screens, print workflows, or unknown placements).
• Use raster (PNG/WebP) when you need maximum compatibility, predictable rendering, or when the platform doesn’t accept SVG (some ad platforms, legacy CMS fields, certain email clients).

A useful mental model:
- Badges (icon-like marks) are often used small in nav bars and filters—raster can work well if you export at the right size.
- Wordmarks have thin strokes and letterforms—these show raster blur sooner, so vector is often the better default.

Example: a wordmark benefits from SVG when displayed at varying widths. Here’s a wordmark-rendered example:

And here are compact badge variants that often appear in UI lists or filters:

If your UI uses fixed-size icons (say 24px or 32px), you can serve raster at 2× or 3× those sizes (e.g., 64px or 96px) to keep edges crisp on high-density displays.

1) Vehicle listing photos

Marketplace and inventory images are almost always raster (JPG/WebP/AVIF). Photos are continuous-tone and compress well with modern codecs.

2) Dealer and OEM web UI icons

Navigation logos, brand filters, and comparison tables often use small raster badges because they’re fast to render and easy to cache. If you control the size, a well-exported WebP badge is a strong choice.

3) Social media templates and ads

Many creative pipelines export raster assets because ad platforms standardize around pixel dimensions (e.g., 1080×1080). Raster is also more predictable across platform uploaders.

4) Email signatures and newsletters

SVG support is inconsistent in email clients; raster PNG is still common. The tradeoff is you must choose a high enough pixel size to avoid blur.

5) App icons and favicons

App icons are delivered as raster in multiple sizes. For a brand badge, you might generate a set (48, 96, 192, 512) so Android, iOS, and browsers pick the best size.

If you’re building any of these, Motomarks helps you standardize logo retrieval and avoid mismatched “random PNGs from Google.” You can fetch consistent badges/wordmarks and choose formats and sizes appropriate for raster delivery.

PNG
- Best when you need transparency and sharp edges.
- Usually larger than WebP for the same visual quality.

JPG/JPEG
- Best for photos (cars, interiors, showrooms).
- Not ideal for logos due to compression artifacts and no true transparency.

WebP
- Great modern default for the web: smaller files, supports transparency, flexible compression.
- Works well for both photos and logos when your audience browsers support it (most do).

For car logos used in UI, a practical approach is:
- Prefer SVG for scalability when supported.
- Otherwise serve WebP (lossless for logos) with transparent background.
- Keep a PNG fallback when needed.

Motomarks makes this selection easier by letting you request the logo type (badge/wordmark/full), format (svg/png/webp), and size (xs–xl) via URL parameters.

Raster images connect to a few essential concepts you’ll run into when working with automotive branding systems:

• Vector Image: the scalable counterpart to raster, usually SVG on the web. See: /glossary/vector-image
• SVG: a common vector format for logos and icons. See: /glossary/svg
• PNG: popular raster format with transparency. See: /glossary/png
• WebP: efficient modern raster format. See: /glossary/webp
• Logo Wordmark vs Badge: choosing the right mark for the context. See: /glossary/wordmark

If you’re implementing logos programmatically, the quickest path is the Motomarks documentation: /docs. For usage limits and production rollouts, review /pricing.